Question: What is the unit of energy that starts with the letter z
Paraphrase: What is the unit of vitality that begins with the letter z
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q2916980 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 'z')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
Answer: zettajoule, zettajoule